Inspec keywords: moisture measurement; microwave measurement; electric impedance measurement; Maxwell equations; permittivity measurement; dielectric materials; inhomogeneous media

Other keywords: plane wave; Maxwell equations; subsurface measurement; homogeneous layers; linearly varying dielectric permittivity; dielectric material; layered media; Airy functions; impedance transformation

Subjects: Impedance and admittance measurement; Dielectric variables measurement; Humidity measurement; Measurement of basic electric and magnetic variables; Electrical instruments and techniques; Dielectric permittivity; Hygrometry; Microwave measurement techniques